org.apache.poi.hpsf
Class Section

java.lang.Object
  org.apache.poi.hpsf.Section

Direct Known Subclasses:

MutableSection

public class Section
extends java.lang.Object

Represents a section in a PropertySet.

Section

public Section()

Creates an empty Section.

Section

public Section(Section s)

Constructs a Section by doing a deep copy of an existing Section. All nested Property instances, will be their mutable counterparts in the new MutableSection.

Parameters:

s - The section set to copy

Section

public Section(byte[] src,
               int offset)
        throws java.io.UnsupportedEncodingException

Creates a Section instance from a byte array.

Parameters:

src - Contains the complete property set stream.

offset - The position in the stream that points to the section's format ID.

Throws:

java.io.UnsupportedEncodingException - if the section's codepage is not supported.

getFormatID

public ClassID getFormatID()

Returns the format ID. The format ID is the "type" of the section. For example, if the format ID of the first Section contains the bytes specified by org.apache.poi.hpsf.wellknown.SectionIDMap.SUMMARY_INFORMATION_ID the section (and thus the property set) is a SummaryInformation.

Returns:

The format ID

setFormatID

public void setFormatID(ClassID formatID)

Sets the section's format ID.

Parameters:

formatID - The section's format ID

setFormatID

public void setFormatID(byte[] formatID)

Sets the section's format ID.

Parameters:

formatID - The section's format ID as a byte array. It components are in big-endian format.

getOffset

public long getOffset()

Returns the offset of the section in the stream.

Returns:

The offset of the section in the stream.

getPropertyCount

public int getPropertyCount()

Returns the number of properties in this section.

Returns:

The number of properties in this section.

getProperties

public Property[] getProperties()

Returns this section's properties.

Returns:

This section's properties.

setProperties

public void setProperties(Property[] properties)

Sets this section's properties. Any former values are overwritten.

Parameters:

properties - This section's new properties.

getProperty

public java.lang.Object getProperty(long id)

Returns the value of the property with the specified ID. If the property is not available, null is returned and a subsequent call to wasNull will return true.

Parameters:

id - The property's ID

Returns:

The property's value

setProperty

public void setProperty(int id,
                        java.lang.String value)

Sets the string value of the property with the specified ID.

Parameters:

id - The property's ID

value - The property's value.

setProperty

public void setProperty(int id,
                        int value)

Sets the int value of the property with the specified ID.

Parameters:

id - The property's ID

value - The property's value.

See Also:

setProperty(int, long, Object), getProperty(long)

setProperty

public void setProperty(int id,
                        long value)

Sets the long value of the property with the specified ID.

Parameters:

id - The property's ID

value - The property's value.

See Also:

setProperty(int, long, Object), getProperty(long)

setProperty

public void setProperty(int id,
                        boolean value)

Sets the boolean value of the property with the specified ID.

Parameters:

id - The property's ID

value - The property's value.

See Also:

setProperty(int, long, Object), getProperty(long)

setProperty

public void setProperty(int id,
                        long variantType,
                        java.lang.Object value)

Sets the value and the variant type of the property with the specified ID. If a property with this ID is not yet present in the section, it will be added. An already present property with the specified ID will be overwritten. A default mapping will be used to choose the property's type.

Parameters:

id - The property's ID.

variantType - The property's variant type.

value - The property's value.

See Also:

setProperty(int, String), getProperty(long), Variant

setProperty

public void setProperty(Property p)

Sets a property.

Parameters:

p - The property to be set.

See Also:

setProperty(int, long, Object), getProperty(long), Variant

setProperty

public void setProperty(int id,
                        java.lang.Object value)

Sets a property.

Parameters:

id - The property ID.

value - The property's value. The value's class must be one of those supported by HPSF.

getPropertyIntValue

protected int getPropertyIntValue(long id)

Returns the value of the numeric property with the specified ID. If the property is not available, 0 is returned. A subsequent call to wasNull will return true to let the caller distinguish that case from a real property value of 0.

Parameters:

id - The property's ID

Returns:

The property's value

getPropertyBooleanValue

protected boolean getPropertyBooleanValue(int id)

Returns the value of the boolean property with the specified ID. If the property is not available, false is returned. A subsequent call to wasNull will return true to let the caller distinguish that case from a real property value of false.

Parameters:

id - The property's ID

Returns:

The property's value

setPropertyBooleanValue

protected void setPropertyBooleanValue(int id,
                                       boolean value)

Sets the value of the boolean property with the specified ID.

Parameters:

id - The property's ID

value - The property's value

See Also:

setProperty(int, long, Object), getProperty(long), Variant

getSize

public int getSize()

Returns:

the section's size in bytes.

wasNull

public boolean wasNull()

Checks whether the property which the last call to getPropertyIntValue(long) or getProperty(long) tried to access was available or not. This information might be important for callers of getPropertyIntValue(long) since the latter returns 0 if the property does not exist. Using wasNull the caller can distiguish this case from a property's real value of 0.

Returns:

true if the last call to getPropertyIntValue(long) or getProperty(long) tried to access a property that was not available, else false.

getPIDString

public java.lang.String getPIDString(long pid)

Returns the PID string associated with a property ID. The ID is first looked up in the Section's private dictionary. If it is not found there, the method calls SectionIDMap.getPIDString(org.apache.poi.hpsf.ClassID, long).

Parameters:

pid - The property ID

Returns:

The property ID's string value

clear

public void clear()

Removes all properties from the section including 0 (dictionary) and 1 (codepage).

equals

public boolean equals(java.lang.Object o)

Checks whether this section is equal to another object. The result is false if one of the the following conditions holds:

• The other object is not a Section.
• The format IDs of the two sections are not equal.
• The sections have a different number of properties. However, properties with ID 1 (codepage) are not counted.
• The other object is not a Section.
• The properties have different values. The order of the properties is irrelevant.

Overrides:

equals in class java.lang.Object

Parameters:

o - The object to compare this section with

Returns:

true if the objects are equal, false if not

removeProperty

public void removeProperty(long id)

Removes a property.

Parameters:

id - The ID of the property to be removed

write

public int write(java.io.OutputStream out)
          throws WritingNotSupportedException,
                 java.io.IOException

Writes this section into an output stream.

Internally this is done by writing into three byte array output streams: one for the properties, one for the property list and one for the section as such. The two former are appended to the latter when they have received all their data.

Parameters:

out - The stream to write into.

Returns:

The number of bytes written, i.e. the section's size.

Throws:

java.io.IOException - if an I/O error occurs

WritingNotSupportedException - if HPSF does not yet support writing a property's variant type.

setDictionary

public void setDictionary(java.util.Map<java.lang.Long,java.lang.String> dictionary)
                   throws IllegalPropertySetDataException

Sets the section's dictionary. All keys in the dictionary must be Long instances, all values must be Strings. This method overwrites the properties with IDs 0 and 1 since they are reserved for the dictionary and the dictionary's codepage. Setting these properties explicitly might have surprising effects. An application should never do this but always use this method.

Parameters:

dictionary - The dictionary

Throws:

IllegalPropertySetDataException - if the dictionary's key and value types are not correct.

See Also:

getDictionary()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()

toString

public java.lang.String toString(PropertyIDMap idMap)

getDictionary

public java.util.Map<java.lang.Long,java.lang.String> getDictionary()

Gets the section's dictionary. A dictionary allows an application to use human-readable property names instead of numeric property IDs. It contains mappings from property IDs to their associated string values. The dictionary is stored as the property with ID 0. The codepage for the strings in the dictionary is defined by property with ID 1.

Returns:

the dictionary or null if the section does not have a dictionary.

getCodepage

public int getCodepage()

Gets the section's codepage, if any.

Returns:

The section's codepage if one is defined, else -1.

setCodepage

public void setCodepage(int codepage)

Sets the codepage.

Parameters:

codepage - the codepage